Lamp



FIG. 1 is a top plan view of the lamp;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a side view thereof; and,

FIG. 6 is an opposite side view thereof.

The ornamental design for a lamp, substantially as shown and described.